Medicare Advantage in Mason County, MI, for 2027.
CMS lists 50 Medicare Advantage plans here for 2027, 4 fewer than 2026 (54). 6,246 people in the county had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 plan file (October 2026 release), CMS CY2026 plan file (September 2026 release), CMS enrollment by county (CPSC), October 2026, CMS 2027 Plan Crosswalk (October 1, 2026), CMS 2027 Star Ratings Data Tables (October 8, 2026). Member counts are floors because CMS hides counts of 10 or fewer.
The county in numbers
Plans that end here for 2027
6 plans with members in the county end or leave it, plus 16 with 10 or fewer members here. CMS moves 12 members to another plan, and 1,695 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| PriorityMedicare Key (HMO-POS) | Corewell Health | 1,459 | Plan leaves this county |
| PriorityMedicare Edge (PPO) | Corewell Health | 554 | Plan leaves this county |
| PriorityMedicare Vital (PPO) | Corewell Health | 232 | Plan terminated |
| Humana USAA Honor Giveback with Rx (PPO) | Humana | 190 | Plan leaves this county |
| PriorityMedicare Thrive (PPO) | Corewell Health | 103 | Plan leaves this county |
| PriorityMedicare Thrive Plus (PPO) | Corewell Health | 54 | Plan leaves this county |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| BCN Advantage Elements (HMO-POS) | BCN Advantage Elements (HMO-POS) | 12 |
Who holds the members
- Corewell Health3,034
- Blue Cross Blue Shield of Michigan Mutual Ins. Co.1,700
- Humana588
- CVS Health439
- UnitedHealth298
- Trinity Health116
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- BCN Advantage Classic (HMO-POS)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- BCN Advantage Elements (HMO-POS)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- BCN Advantage Prestige (HMO-POS)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- Medicare Plus Blue + Meijer (PPO)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- Medicare Plus Blue Assure (PPO)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- Medicare Plus Blue Signature (PPO)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- Medicare Plus Blue Value (PPO)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
- Medicare Plus Blue Vitality (PPO)Blue Cross Blue Shield of Michigan Mutual Ins. Co.4.5
2027 overall Star Rating, 4.5 or more. Each plan's measure stars are in the county lookup.
See every plan, premium and copay in the free lookup.
Sort all 50 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open Mason in the lookupWorking this county for AEP?
The AEP 2027 County Kit puts this county and your others in one file: the plans that end, where members land, what is still sold and a crosswalk sheet, with every number tied to its CMS file.
See the AEP 2027 County KitAll Michigan county pages. Facts from public CMS files, prepared by Health and Tech Now. Not plan advice. Check a plan's Summary of Benefits before you enroll.